Cited by 118Probiotics and Fermented FoodsGut microbiota and healthInfant Nutrition and Health

Generation of NO by probiotic bacteria in the gastrointestinal tract

Sobko, Tanja, Huang, Liyue, Midtvedt, Tore, Norin, Elisabeth, Gustafsson, Lars E., Norman, Mikael, Jansson, Emmelie Å., Lundberg, Jon O.·2006·Free Radical Biology and Medicine

Abstract

Probiotic bacteria elicit a number of beneficial effects in the gut but the mechanisms for these health promoting effects are not entirely understood. Recent in vitro data suggest that lactobacilli can utilise nitrate and nitrite to generate nitric oxide, a gas with immunomodulating and antibacterial properties. Here we further characterised intestinal NO generation by bacteria. In rats, dietary supplementation with lactobacilli and nitrate resulted in a 3-8 fold NO increase in the small intestine and caecum, but not in colon. Caecal NO levels correlated to nitrite concentration in luminal contents. In neonates, colonic NO levels correlated to the nitrite content of breast milk and faeces. Lactobacilli and bifidobacteria isolated from the stools of two neonates, generated NO from nitrite in vitro, whereas S. aureus and E. coli rapidly consumed NO. We here show that commensal bacteria can be a significant source of NO in the gut in addition to the mucosal NO production. Intestinal NO generation can be stimulated by dietary supplementation with substrate and lactobacilli. The generation of NO by some probiotic bacteria can be counteracted by rapid NO consumption by other strains. Future studies will clarify the biological role of the bacteria-derived intestinal NO in health and disease.

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Crossref · 10.1016/j.freeradbiomed.2006.06.020

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Authors
Sobko, T., Huang, L., Midtvedt, T., Norin, E., Gustafsson, L. E., Norman, M., Jansson, E. Å., & Lundberg, J. O.
Affiliations
Karolinska Institutet (SE)
Corresponding author
Sobko, Tanja
Venue
Free Radical Biology and Medicine
Publisher
Elsevier BV
Published
2006-09
Volume
41
Issue
6
Pages
985-991
ISSN
0891-5849 (ISSN-L)
OpenAlex
W2093280926
Cited by
118
References
34
Citations by year
2026: 2 · 2025: 3 · 2024: 6 · 2023: 6 · 2022: 8 · 2021: 6 · 2020: 7 · 2019: 6 · 2018: 9 · 2017: 9 · 2016: 13 · 2015: 7 · 2014: 6 · 2013: 3 · 2012: 6
FWCI
8.05
Type
journal article
Language
en
Open access
closed
Locations
  • Free Radical Biology and Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • The HKU Scholars Hub (University of Hong Kong) (submittedVersion)
Funders
  • European Commission
  • Hjärt-Lungfonden
  • Vetenskapsrådet
  • Ekhagastiftelsen
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Health Sciences › Nursing › Nutrition and Dietetics › Infant Nutrition and Health
Keywords
nitric oxide, probiotic bacteria, lactobacilli, Bifidobacterium, nitrate, nitrite, gastrointestinal tract, commensal bacteria, nitrate supplementation, neonates, breast milk, cecum, small intestine, Staphylococcus aureus, Escherichia coli, gut microbiota
MeSH terms
Animals, Cecum, Colon, Female, Gastric Mucosa, Humans, Infant, Newborn, Intestine, Small, Male, Nitric Oxide, Stomach, Rats, Wistar, Probiotics, Delivery, Obstetric, Rats, Lacticaseibacillus rhamnosus

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